Drawing die



March 1942. c. v. LUGINBILL Er'AL 2,277,339

DRAWING DIE Filed April l8 1940 luginzlill d 1 .31; her-1C1;

I INVENTORS BY flew; 2d. .ZLL

ATTORNEY.

Patented Mar. 24, 1942 hairs DRAWING ma Carl v. Luginbili and Paul Bieberich, Fort Wayne, Ind.

Application April 18, 1940, Serial No. 330,358

1 Claim. -(c1. 205-29) The invention relates to drawing-dies wherein a body of suitable material, such as a diamond, is mounted in a support and an opening is drilled through it through which the material to be drawn is passed, such as wire.

In the use of diamond dies for drawing wir the heat generated by the moving wire is a serious factor since the diamond may be damaged by excessiveheat and its usefulness destroyed.

The object of the invention is to provide a die with a cooling system by which the diamond is protected from excessive heat so that its life is greatly prolonged.

The invention isillustrated in the accompanying drawing in which Figure 1 is a plan view of a die having the invention applied thereto; Fig. 2 is a central vertical cross-section of the same and Fi 3 is an edge view of the die in operating position.

Referring to the illustrative drawing the die comprises the holder or support I in which the diamond 2 is embedded by any of the methods in use, the diamond being drilled to provide the wire receiving opening 3 and the holder having the conical cavities 4 to expose the opening in the diamond.

The channels 5 of any selected number extend through the holder adjacent to the diamond and the radial channels 6 extend from the outer surface or perimeter of the holder to the channels 5 resmctively.

- indicated by the arrow.

1 such mounting then the medium will enter the 7 (Fig. 3) and the wire I is drawn in the direction A stream of cold water or solution is directed against the front face of the die, as by the nozzle 8. Heretofore, the cooling medium merely runs down the face of the die and is not very effective to cool the interior of the die and protect the diamond. In our invention some of the cooling medium travels through the channels 5 and cools the metal surrounding the diamond, which cools the diamond. It the mounting of the die in the machine is such that the channels 5 are closed at their rear ends'by channels 5 and discharge through the radial In use the die is held in an upright position channels 6. The channels will be given such size, form or shape as will ensure the entrance and passage of the cooling medium into and through them.

What we claim is: v

- A drawing die comprising a holder having a drawing member flxedtherein, a series of conduits formed in the holder aboutand adjacent to the drawing member and extending in wire drawing direction from one face of the holder to the opposite face and lateral conduits leading from the former conduits to the outer side of the holder, said conduits being adapted to conduct a cooling medium through the holder which is projected against the face of the holder having the entrances to the conduits therein.

CARL V. LUGINBJLL.

PAUL BIEBERICH. 

